Depends, taking up exercise to improve your health isn't necessarily, but believing that you need to take up a specific exercise is a strong indication that your cargo culting.
For example, my friends always said I should try crossfit. I tried it 3 times all with failure. Then I began indoor rock climbing because my friend lost weight doing it. I tried it and loved it. Now I'm 30kg lighter. Took a couple of years, but whatever.
My conclusion: whatever keeps you going.